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An experiment on elephants in captivity was done to find out whether breeding would occur more often when the elephants were kept together in a herd or when a male was isolated with a female. Explain how ecological validity affects the ability to generalize these results to wild elephants.
A box contains 4 one-dollar bills and 3 five-dollar bills. You choose six bills at random and without replacement from the box. Let T6 be the amount you get. What is Var(T6)?
The random variable X, representing the number of accidents in a certain intersection in a week, has the following probability distribution
Figures for the yearly crime rate (the number of crimes per 1,000 population) in Mississippi, USA from 1993 to 2002 are as follows:
Do the partial F-statistic and t-statistics have to agree? For example, consider adding two explanatory variables W and U to a regression.
four people are randomly from a group consisting of six men and six women. what is the probability that the group will
A human society claims that less than 31% of U.S. households own a dog. In a random sample of 392 U.S. households, 155 say they own a dog. At a=0.03, is there enough evidence to support the society's claim?
Could rejecting the null hypothesis actually be a positive thing in an experiment or test? Please provide and example with your thoughts. Could you think of a situation where rejecting the null hypothesis does not mean the alternative hypothesis is ..
Given that x and y are both positive, solve the simultaneous equations.
Determine the mean number of times the machine was used per day.
The procedure for-each is similar to map. It takes as arguments a procedure and a list of elements. However, rather than forming a list of the results, for-each just applies the procedure to each of the elements in turn, from left to right.
The cost to prepare the equipment for producing hot dogs is $66. Annual holding costs are 45 cents per hot dog. The factory operates 297 days a year.
some jobs submitted for processing on a particular cpu have fatal programming errors while others do not. suppose that
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